removed pbspro mention

docs.it4i/pbspro.md

-# PBS Professional Documentation
-
-To check the version of PBS installed on a cluster, type:
-
-```bash
-$ qmgr --version
-```
-
-For more information, see the [PBS Professional Documentation][1].
-
-[1]: https://2021.help.altair.com/2021.1.2/PBS%20Professional/PBSAdminGuide2021.1.2.pdf

mkdocs.yml

@@ -286,7 +286,6 @@ nav:
       - QtiPlot: software/viz/qtiplot.md
       - VirtualGL: software/viz/vgl.md
       - VESTA: software/viz/vesta.md
-    - PBS Pro Documentation: pbspro.md
   - Clouds:
     - E-Infra CZ Cloud: cloud/einfracz-cloud.md